Combined concrete mixing and elevating apparatus.



C. W. PARSONS.

COMBINED CONCRETE MIXING AND ELEVATING APPARATUS.

APPLICATION FILED MAR. I8, I9I6.

I :7 :I I @www C. W. PARSONS.

COMBINED CONCRETE MIXING AND ELEVAIING APPARATUS.

APPLICATION FILED MAR. I8. |916.

1,209,483. Patented Dee.19,1916.

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Specication of Letters Patent.

Patented Dec., 19, 1916.

Application filed March 18, 1916. Serial No. 85,171.

To all 'whom it may concern:

Be it known that I, CHARLES W. PARSONS, a citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful 1mprovements in Combined Concrete Mixing and Elevating A. paratus, of which the foliliication.

This invention relates to a combined mixing and elevating apparatus which has for its object the .provision of means in the nature of an elevator or hoist, the hoisting elements thereof constituting concrete mixers arranged in such manner that they may be automatically rotated to mix the concrete during the ascent of the hoist or arranged in such manner that they may be driven to mix the concrete when the hoist is at rest and the concrete mixer is being filled.

Further objects and advantages of the invention will be set forth in the detailed description which now follows:

ln the accompanying drawings: Figure 1 is a side elevation of thecombined hoisting and mixing apparatus yconstructed in accordance with the present invention; Fig. 2 is a side elevation of one of the concrete mixers and the frame in which it is mounted; Fig. 3 is a horizontal sectional view upon line 3 3 of Fig. 2;' Fig. 4 is a vertical sectional view through one otthe frames, illustrating the manner in whlch the concrete mixer tips to discharge its load.

Referring to the drawing, the numerals 5 designate the vertical members and 6 the horizontal members of a tower. Mounted to travel vertically in this tower are two cages 7 and 8. These cages are connected by a cable 9which passes directly :from one of said ca es and over pulleys 10 and 11 to the other o said cages, whereby these cages are always held in a denite and spaced relation to each other and one of said cages counterbalances the other, so that the hoisting engine or other motor has only to lift the weight of the concrete. Trunnioned in each of the `cages 7 and 8 is a tiltingirame 12, the mounting of said frames in the cages being through the medium of a stub shaft 13 and a shaft 14. Grooved pulleys 15 are secured to the shafts 14. The shafts 14:a carry beveled inions 16 which mesh with beveled toothe rings 1'? upon drums 18 in which the concrete is mixed during the rotation of said drums. Concrete mixers of this general type are very well known and require no further description. The frames 12 comprise forwardly and rearwardly extending portions 19 which carry beveled rollers 20, said rollers serving to support the drums 18. It will therefore be seen that the drums are capable of rotation and that when the frames 12 are tilted, the contents of the drums `mayfbe discharged from the open ends thereof, in the usual manner. r1`he meshing of the pinion 16 and the gear ring 17 during the tipping operation is maintained because the frames swing about the center about which the pinions rotate. Those portions of the frame 12 lying above and below the grooved pulleys 15 are extended to form yokes 21 and 22 which permit tilting of the frame 12 without interference from the driving cables hereinbeforeI described.

As is well known, the ordinary hoisting engine comprises a pair of drums either of which may be independently driven. Such a hoisting engine has been indicated in a general way at 28 in Fig. 1. rlhe shaft 24 of one of the drums of this hoisting engine is provided, accordin to the present invention, with a groove pulley 25 over which a hoisting cable 26 passes. Cnc end of this hoisting cable passes over a pulley 28, then extends vertically and passes over pulleys 29 and 30 and is connected to the cage 8. rll`he other portion of thls cable 26 passes over a pulley 31, then extends vertically, passes over pulleys 32 and 33 and its end is connected to the cage 7. lt will. therefore be seen that when the pulley 25 is rotated in one direction or the other the cages 7 and 8 will be alternately raised and lowered.v Another cable which l term the driving cable, is i ndi cated at 34. The bight of this cable passes over one of the drums oi the hoisting engine indicated at 35, though it is to be understood that it'may pass over a grooved pulley fast upon the shaft of said drum. These drums are equipped with brakes as is well-known and l have indicated the brake handle at 36 in Fig. 1. One side of this cable 311 passes over a pulley 37, thence vertically through the yokes 21 and 22, takes a turn about one ot the pulleys 15, thence passes over pulleys 38 and 39, thence extends downwardly, pas

26 is hoisting the cages, the pulleys l5 will,

over pulleys40 and 41 thence extends vertically passing through the yokes 2l and 22 of the other cake, takes a t'urn about pulley l5 in said cage, thence passes over pulleys 42v and 4:3, thence downwardly and over a pulley 44 and back to the drum 35. It ywill therefore be seen that if rotation is imparted to the drum 35 to drive the cable 34, rotation will be imparted to thepulleys 15, shafts 14,

pinions 16 and drums 18. It will further be seen that if the brake `36 is applied to the drum 35 and said drum is held against rotaf tion during the time that the hoisting cable struction herein shown and described, be!

cause the material need be handled but once from the. time that it is ,in its separate form 'to thetime that it is delivered mixed ready for useat the top of the building. Even Vthe timeffordinarily employed in transit of the materialfrom the ground to the top'of the towell is uitilized tomix the material during such transit.

While the exemplification of the invention illustrated in the accompanying drawings discloses-a structure adapted to secure the desired result, I am aware that in the wide field of mechanics other ways may readily b e resorted to to accomplish the ends sought and it is to beunderstood that the inventiony is not limited to the particular form of the apparatus shown, but that it includes within its purview whatever changes fairly come within the spirit of the appended claims.

Having 'described my invention what I claim is:

1. The combination with a tower, of a pair of cages mounted therein, means for connecting said cages so that they counterbalance eachother, means for alternately raising and lowering said cages, a concrete mixer in each of said cages, a rotative element for each of said concrete' mixers and through which movement isimparted to said mixers, a driving cable passing through each of said elements, means for driving saidcable and means for holding said cable concrete mixers are driven by the movement of said concrete mixers with relation to said driving cable and said concreteA mixersA may be driven when the cages arefat rest, by the bodily movement of the driving cable.

2. In a device of the character described, the combination with a tower, of a pair of cages mounted therein, and connected lto counterbalance each other, a concrete mixer against movement, whereby when the cages Lf, l v f are being raised and lowered their respective carried by each of said cages, a driving cable connected to sald concrete mlxers, and comv mon to both of them and a lifting cable connected to said cages and common to both of them and means for driving said cables.

3. .In a device of the character described i the combination with a tower, of a pair of cages mounted therein and connected to counterbalance each other, a concrete mixer carried by each of said cages, a driving cable connected to said concrete mixers and a lifting cable connected to said cages, and means for holding the driving cable against movement during the movement of the cages to, thereby cause said driving cableto drive the concrete mixers through the bodily move,- ment of the cages with relation to said cable and means for driving the driving cable to cause it to drive the concrete mixersinde-l pendently of the bodily movement of the cages.

In testimon whereof I allix my signature. .i

HARLES W. PARSONS. 

